In the following table are demand and cost data for a pure monopolist. Complete the table by filling in the columns for total revenue, marginal revenue, and marginal cost. Answer these three questions:

Total Marginal Total Marginal Quantity Price revenue revenue cost cost 0 $3L+$ ______ $ 20 1 32 ______ $ ______ 312: $ ______ 2 3o ____________ in; ______ 3 2.8 ____________ 50 ______ 4 2e ____________ 54 ______ 5 24 ____________ 5c, ______ e 22 ____________ 64 ______ 7 20 ____________ 80 ______ g '18 ____________ 100 ______ 61 1e ____________ 12g ______ 1o 14 160